Vegas Smith
20+ Year Contributor
- 5,191
- 3,108
- Dec 2, 2002
-
Houston,
Texas
1). Any boost, vac, or exhaust leaks?
No
Boost leak tested 5psi above your max boost with no leaks?
Yes
2). Verified mechanical timing?
Yes
3). Verified base timing?
Yes
4). Ignition system
COP or Stock Coil: Stock
Wire brand and Age: NGK
Spark Plug brand, type and Gap: NGK-BR7ES/.028
5). Motor health (Compression Test)
Cylinder 1: 160
Cylinder 2: 160
Cylinder 3: 160
Cylinder 4: 160
6). Performed basic throttle body adjustments?
Idle Switch: Yes
Throttle Cable: Yes
TPS: Yes
BISS: Yes
7). Compression ratio
8.5:1
8). Any known bad sensors or brittle wiring?
No
9). Any DTC/CEL codes?
No
10). Electrical system
Car off (not running): 12.4 volts
Car running: 13.9 volts
11). Base fuel pressure and injector values
Base Fuel Pressure: 43.5
Injector Size (cc/min): FIC hiz-1650
12). Properly calibrated and configured wideband sensor
Sensor Brand: LC2
Calibration Date: 11/30/2018
13). Type of fuel
Type: 93 Octane
Percent of Ethanol: 8%
14). Watched ECMlink how-to videos?
Yes
Hello all, A couple months ago I completely rebuilt my car and ever since then I've had this severe stuttering/hesitation. As you can see from the logs the car sputters and you see a jagged TPS, wideband and MAP. I have no idea why this is. Kevin Jewer thinks it has something to do with the TPS but I can't find anything wrong with any of the wiring. I've tried all new sensors and jiggling of wires near tps and ecu with no difference. The TPS is not improperly grounded either. No idea what this could be. I've looked for shorts everywhere and have checked and re-checked mechanical timing and other sensors as well. Thanks
No
Boost leak tested 5psi above your max boost with no leaks?
Yes
2). Verified mechanical timing?
Yes
3). Verified base timing?
Yes
4). Ignition system
COP or Stock Coil: Stock
Wire brand and Age: NGK
Spark Plug brand, type and Gap: NGK-BR7ES/.028
5). Motor health (Compression Test)
Cylinder 1: 160
Cylinder 2: 160
Cylinder 3: 160
Cylinder 4: 160
6). Performed basic throttle body adjustments?
Idle Switch: Yes
Throttle Cable: Yes
TPS: Yes
BISS: Yes
7). Compression ratio
8.5:1
8). Any known bad sensors or brittle wiring?
No
9). Any DTC/CEL codes?
No
10). Electrical system
Car off (not running): 12.4 volts
Car running: 13.9 volts
11). Base fuel pressure and injector values
Base Fuel Pressure: 43.5
Injector Size (cc/min): FIC hiz-1650
12). Properly calibrated and configured wideband sensor
Sensor Brand: LC2
Calibration Date: 11/30/2018
13). Type of fuel
Type: 93 Octane
Percent of Ethanol: 8%
14). Watched ECMlink how-to videos?
Yes
Hello all, A couple months ago I completely rebuilt my car and ever since then I've had this severe stuttering/hesitation. As you can see from the logs the car sputters and you see a jagged TPS, wideband and MAP. I have no idea why this is. Kevin Jewer thinks it has something to do with the TPS but I can't find anything wrong with any of the wiring. I've tried all new sensors and jiggling of wires near tps and ecu with no difference. The TPS is not improperly grounded either. No idea what this could be. I've looked for shorts everywhere and have checked and re-checked mechanical timing and other sensors as well. Thanks